TORONTO, ON - AUGUST 06: Daniil Medvedev of Russia plays a shot against Jack Sock of the United States during a 1st round match on Day 1 of the Rogers Cup at Aviva Centre on August 6, 2018 in Toronto, Canada. (Photo by Vaughn Ridley/Getty Images)
TORONTO, ON - AUGUST 06: Daniil Medvedev of Russia plays a shot against Jack Sock of the United States during a 1st round match on Day 1 of the Rogers Cup at Aviva Centre on August 6, 2018 in Toronto, Canada. (Photo by Vaughn Ridley/Getty Images)